Improvement in saw-sets



@sind Gtjijiiw.

ERASTUS Y. CLARK,

0F NEW YORK, N. Y.

Letters Patent No. 101,982, dated A11/ril 19, 1870.

IMPROVEMENT IN SAW-SETS.

l'he Schedule referred to in these Letters Patent and making part Of theSame.

To all whom it may concern Be it known that I, ERAs'rUs Y. CLARK, of thecity of New York, in the countyof New York, and State of New York, haveinvented a new and useful Improvement in Saw-Set; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, which will enable others skilled in the art to make and use thesame, reference being had to the accompanying drawings, forming part ofthis speciication. p

This invention relates to new and useful improvements in saw-sets,whereby they are made more perfect, and consequently more useful thanthey have hitherto been; and

It consists in the 'construct-ion and arrangements hereinafterdescribed.

In the accompanying drawings- Figure 1 represents a vertical centralsection of'vthev saw-set.

Figure 2 is'a side view of the same. Figure 3 is a horizontal section onthe plain z of' figs. l and 2.

Figure 4 is a section of iig. 2 on the line y y.

Figure 5 is a front view, showing theadjustable back and thetooth-guide.

Figure 6 is a detailed view of thepunch.

Similar letters of reference indicate corresponding parts.

A is the stock, which is made of any suitable kind of metal, wlich isremovably attached to a bench, table, or other fixture by means of thescrew-shank B, or in 'any other substantial or ,suitable manner.

C is-the punch, which works vertically in a mortise in the stock, asseen in fig. 1. This punch is triangular in form, but I do not confinemyself to that form. The mortise in which it works is a hole drilled orotherwise made in the stock.

The punch has shoulders which receive the pressure of a spiralspring,r1).

This spring is coniined between the (see iig. 4) and the set-screw F. p

G G is the apron upon which the saw is placed iu setting the teeth.

This apron ishinged to the stockby the rod H, and is made adjustable (oris raised or lowered) by means of the screw I, so that more or less setmay be given to the teeth of the saw.

J is the anvil over which the tooth to be set is laid.l

This anvil is faced up on both ends, sothat they may be reversed ifnecessary. It rests on ashoulder, as seen at K, and may be removed orreversedor its position changed by raising it, with a rod or punch,through the hole L.

guide-screw E M is an adjustable back, the position of which governs theposition of the saw upon the apron or of the tooth upon the anvil.

This back is made to move backward or forward by means of the screw N,the thread of which engages with a thread in the back M, so that, byturning a screw, the'back is moved out or in, ascending as the screw isturned, while longitudinal :notion of the screw is prevented by thecollar O.

' The end of this screw acts as a guide and support to the punch G. Theback side of the punch works in contact therewith, as seen in thedrawing.

Attached to the `adjustable back M is an adjustable guide-pin, P, thepoint of which is intended to justV clear the bed R of the stock. 'lhispin is adjusted laterally to or from the center of the anvil, ascendingto the coarseness or ineness of the saw, and so that it willv enter theangle between the teeth, and thereby adj ust the teeth to be set, oneafter the other,

-on or above the anvil and directly beneath the punch.

This guide-pin is fastened by the screw S, and, when it is properlyadjusted, it is an unerring guide for fixing the true position of thesaw-teeth as the saw is fed along under the punch.

For the purpose of adapting the set to very narrow saws, (band-saws forinstance,) I form the apron iu two parts, G and The two parts arerebated, and when separated, as seen in iig. 2, the sides of G arereverse, and the rebated portion with the srrew T forms a recess andguide for the saw, as seen.

When Gr is thus reversed it is held in position by one or more screws Uin a slot or slots V, so that its position may he raised to suit saws ofvarying widths.

Having thus described my invention,

I claim as new and desire to secure by Letters Patentl. In combinationwith a saw-set, the adjustable back M, arranged and operatedsubstantially as and for the purposes described.

2. The adjustable guide-pin I, substantially as and for the purposesdescribed.

3. The arrangement of the screws E F and N with relation to each other,the punch C andv stock A, as

.shown and described, whereby said punch may be adjusted as specified.

The above specification of my invention signed by me this 23d day ofFebruary, 1870.

ERASTUS Y. CLARK.

Witnessesi GEO. W. MABEE, ALEX. F'. ROBERTS.

